Create object of chromedriver which will block push notification.

DriverFactory.java

public class DriverFactory {
  
  public static WebDriver createInstance(){
    DesiredCapabilities capabilities = DesiredCapabilities.chrome();
    ChromeOptions options = new ChromeOptions();
    options.addArguments("disable-notifications");
    capabilities.setCapability(ChromeOptions.CAPABILITY, options);
    WebDriver driver = new ChromeDriver();
    return driver;
  }
   
}